Fixing device for sliding clasp fasteners



Jan.4 5, 193'1.

" Filed Dec. 9, 1932 vio Patented Jan.' 5, 1937 UNITED STATES PATENT oFFicE FIXING Davies Fon sunmc omer Karl Friedrich Ngele, Berlin-Neukolln, Germany 13 Claims.

This invention relates to a. device for fixing sliding clasp elements on a. supporting band and consists in that, after the fastener elements have been placed on the supporting band, two counter rotating cams iix them thereon 'and at the same time move on the band with the comb-like supporting device. The feed of the fastener elements onto the band is effected by a known magazine Awhich has on its lower end a separate holding device, by means of which the elements are fed singly and without jamming, into the gaps in the band carrier. i

The known pressing on devicesare open to the objection that, owing to their length, they sagbecause they simultaneously iix a relatively large number of elements andvthus produce irregular fasteners.l Further, these devices prevent a me-v chanical feeding of the fastener elements. However, devices are also known by means of which the fastener elements are fixed by means of rollers.

The device according to the invention presents the advantage over the known devices, that the xing of the fastener elements on the cloth band is effected in several consecutive phases at a more or less rapid speed according to the'speed of rotation chosen, so that the elements produce an absolutely regular fastener. At the same time as the iixing of the links on the supporting band 30 the band carrier is moved on, owing to the tangential speed of the cam operating pressing jaws, and a positive drive for the feed of the band carrier is avoided. Consequently the feed of the band ceases automatically in the event of any defect during the placing of the fastener elements on the band. f

An embodiment of the invention is illustrated by way of example in the accompanying drawing in which: f l

Fig. lshows the cloth band with a fastener element loosely placed thereon.

Fig. 2 shows a comb-like holding device in the form .of a toothed steel band with longitudinal stiffening.

Fig 3 shows the fixing device with cams in a section taken-on the plane of the cam shafts.

Fig. 4 is a top plan view of the fixing device with cam operating means.

Fig. 5 is a part vertical section through the nx- 50 ing device with mechanical feeding mechanism for the elements.

Fig. 6 is a vertical section showing the xing device with a slightly modified' mechanical feeding mechanism for the fastener elements.

55 The cloth band a; on which the fastener ele- (c1. 15mn ments b must be placed and nxed, 1s placed m known nanner between a two-part band carrier c with comb-like vteeth d andA this carrier. c is slipped into a guide in a base plate h. In this base plate h two cam shaftsf are arranged which 5 are interconnected/by two toothed wheels i and effect the counter rotation of the two cam shafts. The two cam shafts f engage in fixing jaws e, which cannot yield laterally owing to a slot guide.

The feed of the fastener elements to the cloth 10 band a is effected by a magazine m in which the elements arpreviously ordered. To ensure that the elements b arrive regularly betwen the teeth d of the band carrier c, a foot t is arranged in front of the lower magazine aperture, which foot I the elements b straddle like riders. The two arms of the fastener elements then engage between the teeth of the carrier c and are consequently shifted during the movement of the' carrier. They thus slide along the foot t until they can be placed on 20 the cloth band at the end of this foot t. The arrangement of such a foot t presents the advantage that only a single fastener element can drop into each gap in the band carrier c, d, because the next following element bears against the point of the teeth d until the element b can fall into the next gap owing to the feeding of the carrier c.

Fig. 6 shows a modied`form of construction for feeding theelements b onto the cloth banda. A locking pawl q is rotatably mounted on the magazine m and is provided with a pin r projecting into the interior of the magazine. This locking, automatically controlled by the engagement of the locking pawl q in the tooth gaps, and

guides s situated on theV end of the carrier c prevent the elements b from passing out of the magazine during the intermittent feeding of the carrier c a distance of one tooth d each time, so that a. fastening element b can drop into the tooth gap in question.

The iixing device according to the invention operates in thegfollowing manners- The carrier c with the inserted cloth band a is slipped into the guide in the base plate h until its front end is gripped between the two cam jaws e.

`During the rotation of the cam shafts f the carrier Ae is pushed forward owing to the tangential speed of the jaws e. The two slightly bevelledI jaws now press the first fastener elements gently onto the band and the further the carrier is shlfta?. ed, the stronger the fastener elements b wilLbe pressed onto the cloth band a (Fig. 4) The fixing'or pressing on operation is thus carried out in stages.

of the cam jaws is effected by the above described known magazine with the novel arrangements for holding back and perfect introduction of the fastener elements into the tooth gaps.

The fixing device according to the invention presents the advantage that the fastener elements are placed and fixed absolutely regularly on the cloth band and that the machine can run with the cams rotating 'at any desired speed. Ihe

feeding of the band carrier is, as already stated,Y

uniformly effected by the tangential speed 'of the jaws e. It is evident that the speed of feed of the carrier c can be increased by, for example,

allowing the shaft collars k to run directly against the carriers c or by slipping rubber discs or the like over the shaft collars k sothat they effect the feed of the carriers c.

The operation of the device as compared with the known devices consists merely in inserting the fastener elements b into the magazine m and placing into the machine the cloth band inserted in the carriers c.

v I claim:-

1. A device for xing sliding clasp fastener elements on the supporting cloth band, comprising two counter revolving cams movable toward and from the elements to press the same onto the band and at the same time to feed this band.

2. AdeviceasspecifiedinclaimLinwhichthe cams lie substantiallyhperpendicularly to the axis .of the cloth band.

3. A device as specied in claim 1, comprising in combination with the cams, a e arranged above said cams, a cloth band carrier adapted to feed the cloth band between said cams, guides on said carrier adapted to open the discharge aperture of the magazine when the said carrier thereunder and to close said aperture when the carrier has saine.

4. Adeviceasspeciiiedinclaim 1, comprising in combination-withthe cams, a situated above'said camsfband carriers adapted to feed the cloth band'between said cams and under said magazine, combs on said carriers provided with teeth, and a supporting foot on the lower end ofsaid 1 -Msituatedbetwe'ensaid combs adapted to support the fastener elements like riders and to allow the elements to drop one at a time in the gaps in said combs, said elements beingshiftedalongsaidfootbytheteethofsaid combs. v

5. A device as specied in claim i, comprising in combination withthe cams, a e situated above said cams, band carriers adapted to feed the cloth between saidcams and under said magazine, combs on said carriers provided with teeth, and a locking device on said e adapted to cooperate with the tooth SIPQ and teeth in said combs to control the delivery of the' fastener elements from said magazine.

6. A device as specified in claim 1, comprising in combination with the cams, a roller arranged between said cams and adapted to press gently against the end face of the fastener elements loosely placed on the band and to press same lightly onto the band before they are nxed by said cams.

7. A device for fixing sliding clamp fastener elements on a supporting cloth band including a band carrier on which the band is fixed, a magazine arranged. above the carrier to feed the fasteners to the band, and means carried by the magazine controlled by the carrier for feeding the fasteners` singly onto the band.

8. A device for fixing sliding clamp fastener elements on a supporting cloth band including a band carrier on which the band is fixed, a maga-V zine arranged above the carrier to feed the ,fasteners to the band, means carried by the magazine lcontrolled by the carrier for feeding the fas- ;teners singly onto the band, and cams cooperating with the fasteners following their application to the band for clamping the same in position.

9. A device for fixing sliding clamp fasteners on a supporting cloth band, comprising means for placing the fasteners on the band, and rocking means for operating on said fasteners to simultaneously clamp the fasteners on the band and advance the band and clamped fasteners in a predetermined direction.

v10. A device for nzing sliding clamp fasteners on a supporting cloth band, comprising means for placing the fasteners on the band, and means moving alternately toward and from said fasteners; said latter means acting when moving toward the fasteners to contact the same to simultaneously clampthe fasteners ai the band andadvance the bandand clamped fasteners in a predetermined direction, the clamping means increasinginpressureas thebandandfasteners advance.

11. Ameansforclampingfastenersolla-band,v

including elements arramed on opposite sides of the band and movable in a substantially ellipticalpath, themaioraxisofwhiehissuhstantially parallel to the'band, withsaid paths closing the unclamped fasteners, whsrebythe elements duringsuchiravel clampthefastenersonthe bandand iuivancethebamiandelampfosteners.

'12.Adevicefor'fixingslidingchmpfasteners on a supporting cloth band, canllisingmeans for placing the fasteners im the hand, eccentricallyoperatingclampingmeamforthefasteners whenonthebandsaidmeamacngtoclamp thefastenersonthebandinastepbystepdperation through a seria of impulses, each correspondingtoonerevoiutionoftheecomtrically operating clamping m., laid clamping means serving to advance the band and clamp the fastenersinadirection.

13.Ameansforxingslidingehmpfasteners on a band, comprising omsing eentrically operating clamping elemaits, and means for compelling intermittent and myc pressure of said elements on the-fasteners for clnnping the latteronthebanii ,saidmeansalsocompelling a band feeding movement during such progressivepressureandimpartingtoeachfastmera clamping impulse to the proportion of the length of 'the clamping surfaces to the eccentricity of the clamping elements.

KARL FRIEDRICH Naam 

